Intrinsic contribution of Goos-Hanchen shift to 2D phase time (group delay) in graphene

What is it about?

The high-frequency response property is determined by the dwell time or phase time of tunneling electrons. It was widely believed that, the phase time reads d\phi/dE, where \phi is the scattering phase. In this work, we demonstrate that, for oblique incidence, the Goos-Hanchen shift contributes an intrinsic component in the phase time (or group delay), which resulting a remarkable asymmetric feature in the energy dependence of the 2D phase time.

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Why is it important?

The phase time (group delay) in graphene will be illegally calculated without the intrinsic Goos-Hanchen component revealed by us.

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